Trolley.



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G. A. MILLER.

TROLLEY.

APPLIoA'rIoN FILED 11.21, 1910.

Patented Nov. 1, 1910.

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BY Atovneys ,Y UNITED STATES", PnrENT OFFICE.

GEORGE A. MILLER, OF MCKEESPORT, PENNSYLVANIA.

TROLLEY.

Specification of Letters Patent.

Patented Nov. 1, 1910.

Application filed April 21, 1910. Serial No. 556,702.

` in Trolleys, of which the following is a specification, referencebeing had therein to the accompanying drawing.

This invention relates to trolleys, and the objects of my invention areto provide a trolley pole with a harp that willnormally retain thetrolley wheel thereof upon a trolley wire or an electric conductor, andto furnish a harp with positive and reliable means for accomplishing theabove result without interfering with trolley-wire hangers or theoverhead construction of an electric railway system.

Further objects of my invention are to provide a harp with yieldableretainers that are simple in construction and durable, and to providemeans `whereby one of the retainers can be shifted to release a trolleywheel from the trolley wire.

Still further objects of my invention are to eliminate the trouble atpresent experienced by trolley wheels becoming displaced due to therapidity of a car when traveling around a curve, and to provide aretaining device of the above type that will be inexpensive tomanufacture, free from injury by ordinary use and highly efficient forthe purposes for which it is intended.

With the above and such other objects in view as may hereinafter appearthe invention consists of the novel construction, combination andarrangement of arts to be hereinafter specifically described and thenclaimed.

Reference will now be had to the drawing, wherein:

Figure 1 is a front elevation of a trolley constructed in accorda-ncewith my inven- 45 tion. Fig. 2 is a side elevation of the same. Fig. 3is a plan. Fig. 4 is a longitudinal sectional view of the trolley, andFig. is a cross sectional view of the trolley.

In the accompanying drawings the reference numeral 1 denotes a polehaving the upper end thereof provided with a rectangular head 2 andriveted or otherwise secured to the head 2, as at 3, is a yoke 4 havinglateral extensions 5 terminatlng in vertical bearings 6. The same rivetsor fastening means employed for securing the yoke 4 to the head 2 alsohold the lower ends 7 of harp arms 8, these arms having the upper endsenlarged, as at 9, and provided with open slots to receive a hub 11adapted to revolubly support a trolley wheel 12. rl`he hub 11 isprovided with a bore 13 rectangular in cross section and adapted toreceive a rectangular pin 14, said pin having the ends thereof reducedand one end of the pin provided with a head 15, while the opposite endis screw threaded, as at 16, to receive a.

nut 17. The pin 14 is adapted to be supported by the vertical bearings 6and in order that said pin can be easily placed in position, thebearings 5 are provided with large openings 18 in which are mountedbearing pieces 19.

Mounted upon the pins 14 are blocks 20 having circular heads 21 andadapted to telescope said heads are the barrels 22 of oblong retainingmembers 23. These members confront one another and have the facesthereof cut away, as at 24 to provide clearance for the wheel 12 and theremaining portions of said members are provided with longitudinalconfronting grooves 25 adapted to provide clearance for a trolley wireor electric conductor (not shown). The ends of the members 23 arebeveled or pointed, as at 26 whereby said members can easily contactwith a trolley wire hanger and recede without injuring the hanger. Themembers 23 are normally held in engagement with each other by coiledcompression springs 27 encircling the pin 14 within the barrels 22, saidsprings having the outer ends thereof bearing against the circular heads21 of the blocks 20 and the inner ends thereof against the inner sidesof the members 23.

The lateral extensions 5 of the yoke 4 are provided with transversebearings 28 having hangers 29, and trunnioned in said hangers are rockshafts 30, said shafts intermediate the ends thereof being provided withoutwardly extending cranks 31 to theV outer ends of which are attachedcables 32. Upon the ends of the rock shafts are mounted arms 33 havingthe upper endsthereof hookshaped, as at 34 to engage outwardly extendingpins 35 carried by a sectional band 36 clamped upon the barrels 22 andadapted to engage a peripheral fiange 37 carried at the outer` ends ofsaid barrels, whereby when the cranks are pulled downwardly by thecables 32, the barrels 22 will be moved outwardly to carry the members23 thereof outl of engagement and thus provide an opening for thepassage of the trolley wire when it is desired to remove the trolleyfrom the wire or electric conductor.

From the foregoing it will be observed that I have devised novel meansfor bridging or spanning a trolley wire above a trolley wheel, thuspreventing the trolley Wheel from becoming accidentally displaced fromthe trolley wire due to any irregularities in the wire or the rapidityat which a car travels. The retaining members are so arranged that theycan yield and clear a trolley hanger, frog, or other overheadconstruction, thus providing a device that can be used in connectionwith the present type of trolley systems.

What I claim, is:

1.v In a trolley, the combination with a trolley pole having the upperend thereof provided with a head, of a yoke secured to said head andhaving lateral extensions terminating in vertical bearings, harp armsconnected to said yoke, a hub mounted in said harp arms, a wheelrevolubly mounted upon said hub, a pin extending through said hub andadapted to be supported byl said bearings, spring-pressed barrelsmovably mounted upon said pin, retaining members carried by said barrelsand adapted to engage each other, said members having longibearings,spring-pressed barrels movably,

mounted upon said pin, retaining members carried by said barrels andadapted to engage each other, said members having longitudinal groovesformed therein for the trolley wire, and means supported by said yokeand adapted to move said barrels to provide opening for the trolley wirewhen removing the trolley, said means including rock shafts, crankscarried thereby, and arms mounted' upon the ends of said shafts andadapted to move said barrels outwardly.

In testimony whereof I aIiX my signature in the presence of twowitnesses.

GEORGE A. MILLER.

Witnesses I-I. C. EVERT, MAX H. SRoLovITz.

